You Need to Know About Hot Dipped Galvanized Steel Pipe

Galvanized steel pipe is carbon steel pipe coated with a zinc protective layer. The zinc layer acts as a sacrificial layer, which will rust before the underlying carbon steel. The galvanized layer will enhance the anti-corrosion performance of the steel pipe. Galvanized steel pipes include hot-dip galvanized steel pipes and cold-dip galvanized steel pipes.

Why use zinc as a coating? Because zinc is more active than steel. On the one hand, the zinc oxide on the surface of galvanized steel pipe is dense, which can prevent oxidation (corrosion). On the other hand, when galvanic corrosion occurs, the first metal to corrode is zinc rather than steel. The role of the zinc layer is to stop the corrosion rate and prolong the service life of the steel pipe.

For hot-dip galvanized steel pipe is to immerse the derusted steel pipe in a zinc solution at a temperature of 500°C during the manufacturing process, so that the surface of the steel is attached with a zinc layer, so as to achieve the purpose of anti-corrosion.

Hot-dip galvanizing is an effective anti-corrosion treatment for a variety of structural steel products. Since France first used hot-dip galvanizing in industry in 1836, it has a history of more than 180 years. As high-voltage power transmission, transportation, and communication have higher requirements for protection products, the demand for hot-dip galvanizing is also increasing.